Jules julien



Mrs

8- rns METHOD OF MAKING SOLUBLE METAL ELECTRODES FOR ACCUMULATORS.

SPECIFICATION forming part of Letters Patent No. 600,693, dated March 15, 1898.

Application filed September 26,1896. Serial No. 607,098. (No specimens.) Patentedin BelgiumMarch 10, 1896,1To.120,281; in Germany March 18, 1896,110. 35,697; in France April 1, 1896,1l0,255,227; in England April 2, 1896,110. 7,259; in Austria April 25, 1896, No. 46/5,130, and in Hungary April 27, 1896,1lo. 2,857.

To all whom it may concern:

Be it known that I, JULEs JULIEN, engineer, a subject of the King of Belgium, residing at Brussels, in the Kingdom of Belgium, have invented a new and useful Improved Method for Making Soluble Metal Electrodes for Accumulators, (for which patents have been obtained in Belgium, dated March 10, 1896, No. 120,281; addition, dated March 23, 1896, No. 120,529; in Germany, dated March 18, 1896, No. 35,697 of certificate; in France, dated April 1, 1896, No. 255,227; in Great Britain, dated April 2, 1896, No. 7,259; in Austria, dated April 25, 1896, No. lli/5,130, and in Hungary, dated April 27, 1896, No. 2,857 of certificate,) of which the following is a full, clear, and exact description.

The soluble metal electrode for electric accumulators which forms the subject of the present application appertains to the class of electrodes formed by the galvanoplastic deposit of a soluble metalsuch as zinc, cadmium, or

other equivalent or analogous metal-upon a base, either of an insoluble or soluble metal, serving as a support; but my invention is distinguished from its predecessors in that any one of the soluble metals indicated-such as zinc, for instance-is deposited by galvanic process upon a frame or base of copper in such a manner as to cause it to adhere thereto by means of a new manufacturing process which in that it is not attacked and only decomposes in proportion to the discharge in order to reconstitute itself in the same manner during the charging.

The process of producing the soluble metallic electrodes according to my present invention consists in electrolytically depositing upon a plate of copperalayer of copper, which gives it a very finely porous surface of pure copper, then amalgamating the copper surface so produced, and finally electrolytically depositing upon the amalgamated copper plate a coating of zinc, which forms the active electrode surface. The positive electrodes prepared in this manner may be used in a secondary battery in conjunction with negative electrodes of any suitable kind.

Having thus described myinvention, the following is what I claim as new therein and desire to secure by Letters Patent:

The process of producinga soluble electrode for use in secondary batteries, consisting in depositing on a copper plate, by electrolysis, a finely-porous surface of pure copper, then amalgamating the copper surface so produced, and finally depositing on the a algamated surface, a coating of zinc to form the active surface of the electrode.

JULES J ULIEN. Witnesses:

AUG. J OERISSEN, GREGORY PHELAN. 

